ICSE Class 7 Chemistry, Unit 7: Air and Atmosphere
From the CISCE curriculum. 10 key concepts, about 5 days of study at 20 to 30 minutes a day.
What this unit aims at
Air is a mixture of some gaseous components which have wide use in daily life. For example, nitrogen is an important constituent of fertilizers and oxygen is essential for our body for sustenance of life. These gases have important physical and chemical properties and uses.
Your child should be able to
- review that air is a mixture of gases
- recall the components of air
- discuss the use of oxygen and nitrogen in different life processes
- explain from an activity that mass change takes place on combustion
- express the reaction in the form of word equation
- describe the preparation of oxygen in the laboratory using potassium chlorate/ hydrogen peroxide and manganese dioxide as a catalyst
- understand the concept of catalyst
Key concepts in this unit
- Air a mixture of gases.
- Composition of air and uses of its components.
- Oxygen is needed for combustion.
- Mass change during burning (burning of magnesium and candle).
- Word equations for reactions of metals and non-metals (S, C, P, Na, K, Ca, Mg) with O.
- Products formed in acid rain; effects of acid rain.
- Air quality.
- Study the properties of oxygen: (physical properties to include colour, odour).
- Distinguish between:
- Respiration and combustion, Combustion and rusting.
Teach this unit at home
- A day-by-day plan from the CISCE concepts, so you know what to cover each day.
- A step-by-step script for each day, so you know what to say and ask (AI-written from the CISCE curriculum, so check it against your child's school book).
- A quiz at the end.
From the CISCE Curriculum for Classes I to VIII (2016). CISCE sets what is taught, not the textbooks, so schools use different books and there are no page numbers here. Adhian Gurus is not affiliated with CISCE.